5. Frame mounting Frame securing:The frame can be fastened directly to the structure, taking into consideration the pos- sible structure movements. Once any uneven parts of the connection surfaces have been smoothed out, the frame must be connected correctly to the structure body. The frame must be able to absorb the loads imposed by the glazing, and transfer them to the structure. The securing ele- ments must be reliable, durable, and free of rust, and account must be taken of statics requirements. Depending on the installation requirements, the frame is to be sealed to the structure; a check should also be made on the possibility of damage due to subs- idence or changes in the dimensions of the building apertures. Under no circumstances may forces be transferred from the frame to the U-profiled glass! The securing media must not incur any detrimental reciprocal effects on the frame material, such as contact corrosion. In particular, aluminium and steel must not come in contact with one another for this reason, but must be permanently separated from one another by sui- table means such as plastic plates or coatings. Connecting elements for aluminium frames may be made of aluminium if they satisfy the statics requirements. Securing procedures are to be carried out in such a way that the components can expand and contract unhindered as the temperature changes. In order to avoid long-term effects of precipitation water and/or condensation on the frame profiles, the bottom LINIT aluminium framing profile, if not already designed in this manner, is to be formed in such a way that, in extreme cases, drip water which may have collected can be drained away to the outside. It is advisable for appropriate drainage arrangements to be provided in the frame profile, as a function of the individual web widths of the LINIT U-profiled glass types. The drai- nage apertures are to be provided with filters in order to prevent the penetration of dirt into the glazing. Changes in length resulting from temperature fluctuations are to be taken into account when fitting butt joints. Butt joints are to be sealed in such a way that water cannot pe- netrate, and draughts will be avoided. To achieve this, LINIT expansion joint profiles and thrust elements should be fitted carefully onto the butt joint cove-ring. The profiles for the joint covering are pushed in, over, or under; the expansion joints are to be carefully sealed. The corner connections can be jointed either as a mitre joint or as a butt joint.